Means for conditioning granular and like materials



Sept. 11, 1951 R. c. CRANDALL MEANS FOR CONDITIONING GRANULAR AND LIKEMATERIALS 2 Sheets-Sheet 1 Filed Jan. 51, 1947 INVENTOR. R'qy C.CrandaZZ BY 42424. 65%

I firney.

Sept. 11, 1951 R. c. CRANDALL 2,567,472

MEANS FOR CONDITIONING GRANULAR AND LIKE MATERIALS Filed Jan. 51, 1947 2Sheets-Sheet 2 [n uen 2'07".-

Ray C. CrarzdaZZ Patented Sept. 11, 1951 umreoesrarss PATENT orr cs"MnssreewsmTmm-m cameras I ,.A1- roL1nEMsrEa1ALs 'Roy-Qarleton'Grandall,Tillsonburg, Ontario, U Canada Asp-mains anua y 1 1941, Serial. No.asses Inflanada January 77,, 19.47

"this inv ntion relates the h e'thbt an means ter aki g p and ondit ning a ular mater a s..sueh as sand and he like.

a ious types of mach nes have be n p opo heretofore for ut ng and cen ten he ateri such as foundry sand to b ak up the lumps therein and renderthe same uniformly free flowina' H An ob ec o the pres nt invent on s toProv an improved and simplified method and na-chine for cutt n p i drowne; scr n n lump br ak ng, mp rin a d aerat n oundry s and the i e and fr removing rap and o the efro T e nve ti n includes he p ovi oho a 4Claims. (Cl. 2091-262) thin P eierabl .selt-prepeHed'havi s as nel c n ror ad pted 'to'e t nd di ect t e ter al. und r atmen u wa yth oueh a cute a d m ans. f defl ctin downwardly the at iali sui e f o he chu e-The inv n o w be d scr bed ith e erenc o he c omp n n d e a in whi h,

Figu e is a persp cti e side elevation o t ma h ne,

i ur 2 s a persp ct ve view, partly in. seeti h o the m a eon itiohineelments f h mach e, 1

igu e 3 is an nd ele a on 01? the cuttin rotor and asse ated casin andFi ur s d 6 are diagrammatic levational ie il st a in va ious operatingsteps of th device. e w I In he dr ing, l s a self-pr pelled vehicle ofrd nary o s ruc i n prefe ably or the farm tractor type. Theconditioning device 2 of the present invention is pivotally suspendedfrom the vehicle by means of supporting arm 3 pivoted to a shaft 4mounted in the rearward portion of the vehicle.

The conditioning device comprises a substantially semi-cylindricalcasing 5 to which the lower ends of arms 3 are fi-xed and having it openside in rearwardly directed relation to the vehicle. Mounted within thecasing is a horizontally disposed rotor '6, having an axial cylindricalmember 1 carried by shaft 8 journalled in end plates 9 of the casing.Mounted on: the periphery of the member 1 on either side ofthe centralportion thereof are one or more helical vanes or blades l0 and H, thepitch of the blades to the left of the center beingleft hand and thepitch of the blades on the right of the center e ng ri ht hand. wherebymaterilalv enga ed by the lades is conveyed ro either end of th asin towr s the centralisation ther i. h inward ends of the helicalbladesterminate in 2 t radially directed blades 12, constitutingimpellers adapted, to engage and direct upwardly bycentrifugal actionthe material conveyed thereto by the helical blades l0 and H.

The casin is provided at its central portion with a shield 11 3 toprovide a cover memberfor the radial blades and an opening [4 isprovided in the upper portion of the casing in line with the shield iii.A chute [5 extend upwardly and rearwardly of the casing and encloses theopen* ing I to form a delivery chute for the "material directedtherei-nto by the radial blades l2.

A deflector member 16 is carried by the vehicle in slightly elevatedrelation to the chute' outlet and having its end portion closelyadjacent the chute. The deflector has a curved upper plate I? anddownwardly directed side plates l8; The deflector is preferably formedin substantially two halves which meet about the line 19, the twoportions of the upper plate being hinged at 20 so that the rearward halfof the deflector may be raised to vary the trajectory of materialdeflected therefrom. The rearward end of the defleetor is alsopreferably provided with a downwardly inclined fiap portion 2| hinged at22 to the upper plate. The flap 2| is formed of screening material.

Also carried by the vehicle directly below the deflector andsubstantially coextensive therewith is a fiat screen 23 having a stop 24hinged to its rearward end, a screening stop 25 at its forward end, anda downwardly inclined screening'fla'p or apron 25 fixed to it forwardend and slightly below the outlet of chute I 5. The screen 23 isprovided with narrow side walls 21 and, as shown,

is longitudinally inclined, the end adjacent the chute being lower thanthe opposite end. Moreover, the portions 28 and 29 of the screen oneither side of its longitudinal axis are slightly inclined downwardlytowards the sides. The rotor B i preferably driven from the shaf 8 bymeans of gears 30 and SI and chain drive 32. Shaft 8 is driven in anysuitable manner,

' preferably from the prime mover of the vehicle.

Any suitable means is also provided for raising and lowering the rotorand casing to clear the sand piles orto place the same at floor levelfor engagement with a sand pile. A hoisting mechanism, preferablyactuated by the vehicle power means, is indicated at 33. I

Angularly directed scrapers 34 may be DIO- vided at either end of thecasing 5.

The edges of the helical blades may be serrated as indicated at 35 toprovide more effective cutting.

Inoperation', the vehicle is moved rearwardly veyed inwardly by thehelical blades into contact with the radial blades I2, which project astream of sand upwardly through the chute l5 and into engagement withthe deflector plate H. The lat-'- ter deflects the sand particlesdownwardly through the screen 23. This treatment thorough- 1y aeratesthe sand, as is desirable for foundry casting purposes. The flap 2|,preferably screened, acts as a stop for any pieces of metal or likescrap which may be present in the sand and tends to break up anylumpsremaining in the sand.

As the sand passes through the screen, pieces of scrap and the like moveover the inclined surfaces of the screen and collect in the lowercorners or pockets 38.

When the device is employed for cutting and piling the sand, therearward half of the deflector plate I! is raised to substantially theposition shown in Figure 5, with the flap 2! also swun upwardly, asindicated, whereby the surfaces of such members are above the path ortrajectory of the stream of sand issuing from the chute Hi. The streamthus continues beyond the end of the screen 23, the stop 24 of which isswung downwardly out of the way.

Following cutting and screening and/or piling, in the manner described,the rotor and easing are raised to the position shown in Figure 6, whereupon the vehicle is actuated to move the machine 4 like materialsincluding at one end thereof an upwardly directed chute having an inletat its lower end and an outlet at its upper end, and means adjacent saidinlet for projecting through the chute by centrifugal force an aeratedstream of said material, a deflector plate carried by the machine andhaving one end overlying and in spaced relation to the chute outlet andits other end extending towards the other end of the machine, the lowersurface of said plate being concave and disposed in intersectingrelation to the normal trajectory of said stream as it emerges from thechute outlet to deflect the stream downwardly, said plate consisting ofa forward section and a rearward section hingedly joined together along'a transverse line, said sections being upwardly swingable out ofintersecting relation with the normal trajectory of the stream, a flatscreen forwardly for return travel over the treated sand pile.

The machine described requires the services of but one operator andcombines the functions of cutting, aerating, screening, lump breaking,scrap removal, and piling of foundry sand and like materials.

What is claimed is: 1. In a conditioning machine for granular an likematerials including at one end thereof an upwardly directed chute havingan inlet at its v lower end and an outlet at its upper end, and

means adjacent said inlet for projecting through the chute bycentrifugal force an aerated stream of said material, a deflector platecarried by the machine, and having one end overlying and in spacedrelation to the chute outlet and its other end extending towards theother end of the machine, the lower surface of said plate being concaveand disposed in intersecting relation with the normal trajectory of saidstream as it emerges from the chute outlet to deflect the streamdownwardly, said plate consisting of a forward section and a rearwardsection hingedl joined together along a transverse line, said sectionsbeing upwardly swingable out of intersecting relation clined in anupward direction from said chute .outlet and transversely inclined in adownward direction from the longitudinal axis of the screen, said screenhaving stops at the sides and .lower end thereof to providescrap-receiving pockets.

2. In-aconditioning machine for granular and screen having one endadjacent the chute outlet and its other end adjacent said other end ofthe deflector plate, a stop hinged to said other end of the screen, astop flxed to said one end of the screen and extending upwardlytherefrom, and a screened apron hinged to said one end of the screen andextending in downwardly inclined relation therefrom.

3. Ina conditioning machine for granular and like materials including atone end thereof an upwardly directed chute having 'an inlet at its lowerend and an outlet at its upper end, and means. adjacent said inlet forprojecting through the'chute by centrifugal force an aerated stream ofsaid material, a deflector plate carried by the machine and having oneend overlying and in spaced relation to the chute outlet and its otherend extending towards the other end of the machine, the lower surface ofsaid plate being concave and disposed in intersecting relation to thenormal trajectory of said stream as it emerges from the chute outlet todeflect the stream downwardly, and a flat screen carried by the machineand having its major portion disposed directly below, and coextensivewith, the major portion of said deflector plate to receive the streamdeflected therefrom, said plate consisting of a forward section and arearward section hingedly joined together along a transverse line, saidsections being upwardly swingable out of intersecting relation with thenormal trajectory of said stream to permit the stream to pass over thescreen.

4. In a conditioning machine for foundry sand including a self-propelledvehicle having a forward end, a rearward end, an upwardly directed chuteat said rearward end having an inlet at its lower end and an outlet atits upper end, and means adjacent said inlet for projecting through-thechute by centrifugal force an aerated deflected therefrom and beinginclined in an upward direction from the rearward end of the vehicle,said plate consisting of a forward section and a rearward sectionhingedly joined together along a transverse line, said sections being-upwardly swingable out of intersecting relation with the normal trajectoryof the stream to permit the stream to pass over the screen.

ROY CARLETON CRANDALL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Number 16 182.307

Name Date Marquardt Nov. 19, 1912 Wyble Sept.'16, 1919 Townsend Dec. 30,1924 Simpson Apr. 21, 1925 Heisserman got. 12, 1937 Stevenson Jan. 18,1938 James M5yf14, 1940 Burg Dec.",15, 1942 Miller Aug 7, 1945 FOREIGNPATENTS 7 Country Date Switzerland Beef 20, 1934

